Radiant heater having multiple heating zones
US5270519A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 1993 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Jan 5, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2213/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a radiant heater having multiple heating zones there is provided a first heating zone incorporating at least one heating element and a second heating zone incorporating at least first and second heating elements. A thermal cut-out device includes a temperature sensor which passes through at least the first heating zone and which is responsive solely to heat emitted in the first heating zone. A manually operable switch permits switching between first and second heating states. In the first heating state, the at least one heating element in the first heating zone is energised alone, while in the second heating state the at least one heating element in the first heating zone is electrically connected in series with the second heating element of the second heating zone, the at least one heating element and the second heating element being energised in parallel with the first heating element of the second heating zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.